Bolting reel



(NQModel.) 31Sheets-Sheet 1.

W. D, GRAY. BOLTING-REBL.

Patented Dec. 4, 1888.`

V(Nq Mqde1.)' 3 sheetssheet' W. D. GRAY.'

BOLTING REEL.

No. 893,825. Patented Dec. 4, 1888.

N. PETERS. PhMu-Lithogmpller. Washngon. n.0.

(No Model.) 3' sheets-seet 3.

- W. D. GRAY.

y BOLTING REEL. No. 393,825. 4 Patented' Dep. 4, 1888'.

Invair/fof.

UNITED STATES PATENT OFFICE.

VILLIAM D. GRAY, OF MILVAUKEE, WISCONSIN, ASSIGNOR TO E. P. ALLIS &

SAME PLACE.

BOLTING-REEL.

SPECIFICATION forming part of Letters Patent No. 393,825, dated December 4, 1888.

Application filed March 24,1886.

Serial No. 196,394. (No model.)

To all whom it may concern.:

Be it known that I, VILLIAM D. GRAY, of Milwaukee, in the county of Milwaukeeand State of lVisconsin, have invented certain Improvements in Combined Scalping and Aspirating Machines, of which the .following is a specification.

My invention relates to a machine adapted to separate the iine iiour and middlings from the coarser materials and subject the valuable portions of the coarse materialto the action of an air-current to remove the light impurities therefrom.

In the 'accompanying drawings, Figure l represents a longitudinal vertical section of the machine on the line of the main shaft. Fig. 2 is a vertical cross-section on the line as, looking in the direction indicated by the arrow. Fig. 3 is a vertical cross-section on the line y y, looking in the direction indicated by the arrow. Fig. 4 is an elevation of the head of the machine. Fig. 5 is a sectional view, on an enlarged scale, showing the liftingblades employed in the internal screens.

A represents the main frame of the machine.

B represents the main shaft extending through the same from end to end through suitable bearings thereon, with a downwa-rd inclination toward the tail end.

C is a cylindrical screen of smooth Zinc o other sheet metal, provided with suitable perforations commonly from one-sixteenth to one'- twentieth of an 'inch in diameter. This screen is mounted at its two ends on skeleton wheels D D', fixed firmly` to t-he main shaft.

E is a returning-cone of imperforate sheet metal surrounding the internal screen C and constructed of larger diameter at the head of the machine than at the tail, so that all material passing through the inner screen to the inner surface of this cone or tube will flow down the same to the head of the machine, where the cone is provided .with openings 0., through which the material escapes. This returning-cone is supported-atopposite ends Aby collars or disks b b,encircling the inner screen'.

consisting of a frame of wood or other suitable material clothed externally with boltingcloth or wire gauze., This outer screen is iiXed at its head to the collar b and at its tail to the outer iiange of the wheel D', the construction being such that both screens and the intermediate returning-cone revolve t0- gether. The screening surface of the outer reel, F, is usually of finer material at the head end than at the tail, so that the iine flour will be discharged through the head and the middlings through the tail.

,The present machine resembles that represented in Letters Patent of the United 'States No. 332,250, granted to me on the 15th day of December, i885, in that it presents two concentric reels combined with an intermediate returning-cone; but it differs therefrom in that the reels are now made of an outer cylindrical form instead of a conical form, and in that the axis of the reelsis inclined instead of horizontal. The inclination of the cylindrical reels causes the flow of mament of the cone in the opposite direction is so great as to compensate forthis inclination, and also give a downward inclination of the lower surface of the cone toward the head of the machine. Thus it is that although the screens descend toward the tail the concentric cone is enabled to return the material toward the head. The employment of screens which are of an outer cylindrical form is advantageous as compared with those of conical form in that they are more easily constructed, that screening-surfaces of greater area may be used in a body of given size, and in that the bolting-cloth maybe applied more readily and kept under more uniform tension.

For the purpose of increasing the bolting capacity of the inner reel, I mount therein a series of longitudinal blades, H, of sheet metal or other suitable material, their inner edges reel, as shown in Figs. l and 5. As the reel re-v volves in the direction indicated by the arrow these blades carry the material upward terial toward the tail end;V butthe enlargej separated slightly from the surface of the 1 on the ascending side, the material in the course' of its descent flowing downward gradually past the inner edge of the blade over the surface of the screen, which is thus given a greatly-i11creased capacity without beating or agitating the material in such manner as to cause an objectionable ln'oduction ot' the tine or dust tlour. These blades may 11e secured in place in any suitable manner; but I commonly use small metal arms b, riveted at one end 1o the blades and attihe opposite end to the inner face ot the screen. To the outer surface of the returning-cone I secure, as in my previous patent above referred to, longitudinal blades I, which act to carry 111e material upward and deliver it against the inner surface ot' the outer reel, so that it may slide downward thereover. The materials passing through the outer reel fall into the base of the body, which has converging walls provided with gates of well-known form for delivering the material to screw conveyers .I and 1x, which are mounted in troughs provided with returningboards or gates, as usual, to etiect the desired division or gradation of the products.

A vertical partition, I., is commonly located in 111e chamber beneath the reel to maintain the separation between the coarse and tine products delivered therethrough.

The outer reel, F, is extended through the side of and delivers its tailings into a vertical chamber or receptacle, M. lhe inner reel is prolonged or extended, as shown at (1, beyond the outer reel into the side otf a chamber or receptacle, N, which receives the tailings therefrom. The extended end (1 of the inner screen is provided with perforations coarser than those in the remaining portion of its length, so that although the various coarse materials are discharged over the tail the material of the next tiner grade is delivered through 111e extended end into the escaping-chamber t). This chamber is located between the receptacles M and N, and the extended end t" of the central reel extends through or across the same from side to side. In the lower part of this chamber I mount a series 0f inclined overlapping shelves, c, constructed and arranged in the same manner as in ordinary aspirating-machines, with which every miller is at the present day familiar. Between these shelves or deflectors and the reel-extension C', I place aI partition or diaphragm, (t d', to cut ott' the air-current. In order to permit a compact arrangement of the parts, the side d of the partition is curved to follow the periphery of the reel. The latter is provided on the periphery with scrapers c, of leather or other fiexible material,which act on the curved surfaces of the partition, so as to deliver the material therefrom to the gate f, through which it passes to the aspirating devices.

As usual in aspirati11g-machines, there is an upwardly-extending suction-flue, g, which will be connected with a fan or other exhaust apparatus, a throat, 71, for the delivery of the tine heavy products, and a valve-receptacle, yi, to receive such light products as are not carried ott by the air-currents.

APower is communicated to the machine through a pulley, 7.', applied to one end ot' the main shaft, which is in turn provided at its opposite end with a sprocket-wheel, I, which communicatesmotion through a single chain, 111,10 sp1-ecket-wheels on the ends ot' the two conveyers.

1, Atthe head ot the machine there is a feedspout, o, arranged to deliver the material into the head of the inner reel.

'1`hc operation ot the machine is as follows: Motion being imparted to the main shaft B, the screening-surfaces and the intermediate returning-tube revolve in unison. The aspirator-tinc (l being connected with an exhaust apparatus, air flows inward and upward between the various shelves or conductors. The chop delivered through the feed-spout o enters the head of the inner reel or screen, C. '1`heblades II, lifting the material, cause it to work constantlydownward over the smooth screening surface. The tine materials pass through this inner screen to the returning-conc E, andare al1 carried to the head of the machine and delivered through the openings (l. to the head of the outer reel. Flowing downward within this reel, subject to the lifting action of the blades Il, the tine tiour and middlings pass through the upper and finely-clothed end, while the material of a coarser character passes through the tail end of said screen. The coarse middlings pass over the tail into 111e chambcrhl. 'lhematerial which has failed to pass through 111e inner screen, (l, to the returning-cone continues its course into the extended and coarsely-perforated end (1', through which the coarse break and valuable particles of the grain pass to the aspirating devices, b v which they are puritied preparatory to a further reduction. The bran and coarse materials continue over the tail end of C', and are discharged into the chamber or receptacle N.

\\'hile I prefer to make use of inclined screens of outer cylindrical form, as herein described, it is manifest that the extension ot' the inner screen, the aspirating devices, and the blades ll may all be used in connection with screens ot' conical form, such as represented in my previous patent.

llaving thus described my invention, what I claim is- 1. In a scalping and aspirating machine, the two receptacles M and Y and the intermediate aspirating-chamber, in combination with the external reel, delivering its tailings into receptacle M, the retnrning-cone within said reel, and the internal screen extending through the returning-cone and continued beyond the same through the aspirating-chamber to receptacle N, the portion within said chamber having coarserperforations than the remaining portion.

2. In a scalping-machinc, the combination,

i l l IOO IIO

substantially as described, of the following In testimony whereof I hereunto set my 1o elements: la central perforated metal reel, hand, this 30th day of December, 1885, in the blades carried inthe interior of said reel at a presence of two attesting wituessesl distance from itsv surfaces to lift the mate- 5 rial at one side, an imperforate returning- WILLIAM D. GRAY. cone surrounding said reel, the blades secured longitudinally on the outer side of the Iitnessesz returning-tube, and the external encircling JOHN I. MARSHALL, reel. R. BIRKHOLZ. l 

